Rock-drill.



D. S. WAUGH.

vRock DRILL. APPLICATION FILED FEB. I4. I9I4.

Patented Oct. 31, 1916.

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D. S. WAUGH'.

RocK DRILL.

1,203,284. "www" "LED my' '9H' Patengdmgg 12916.

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D. S. WAUGH.

HCK DRILL.

APPLICATION FILED FEB- 14, 1914. 1,203,284. Patented 061;. 31,1916.

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ROCK DRILL.

APPLICATION FILED FEB. 14, 1914.

Paten'd Oct. 31,1916.

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Patented Oct. 31, 1916.

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Rock pmu. APPLICATION FILED FEB. 14k, 1914.

' UNITED STATES PATENT OFFICE.

DANIEL S. WAUGH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILLMANUFACTURING COMPANY, OF DENVER, COLORADO, A CORPORATION OF DELA- WARE.

ROCK-DRILL.

Specication of Letters Patent.

Patented Oct. 31, 1916.

To all rwhom t may concern:

Be it known that I, DANIEL S. WAUGH, a citizen of the United States,residing at Denver, in the county of Denver and State of Colorado, haveinvented new and useful Improvements in Rock-Drills, of which thefollowing is a specification.

rlhe present invention relates more particularly to that type of rockdrills in which the drill is advanced to its work by uid pressure. Inthis type, it is the usual practice to employ a feed cylinder and a feedpistonoperating therein. One of these is connected to the motor. Forcertain types of work, it is desirable that the cylinder be connected tothe motor and the piston has a rod or spur projecting from the rear endof the feed cylinder. Where, however, it is desirable to secure the feedmeans to a support, as for example, the arm of a column, then it isnecessary that the piston be attached to the motor in order that a clampcan be placed around the cylinder, and said cylinder held stationary. Inthe embodiment of the invention disclosed, this latter type of feedingmeans is employed, but various features of the invention may be utilizedwith other forms of structure.

It is one of the objects of the present invention to employ theabove-described specitic arrangement and to provide in connectiontherewith, conveniently accessible means for controlling both the supplyof motive fluid to the feeding means and the arms, and also to controlthe supply of the cleansing` fluid.

Another and important object is to provide means of a novel andeffective character for conveying a cleansing liquid from the rearl endof the machine to the bore or passageway of a drill bit operated on bythe motor piston.

In the accompanying drawings Figure 1 is a view in elevation of thedrill. Fig. 2 is a longitudinal sectional View therethrough. Fig. 3 isa. longitudinal sectional View on an enlarged scale of the rear portionof the feeding means. lFig. 4 is a longitudinal sectional view on anenlarged scale of the front portion of the feeding means and the rearportion of the motor, illustrating in greater detail the connectionsbetween the same. Fig. 5 is a longitudinal sectional .iew onen .enlargedscale of the front por# of Fig. at. Fig. 7 is a cross sectional view onn the line 7 7 of Fig. 3. Fig. 8 is a cross sectional view on the line 88 of Fig. 3. Fig. 9 is a cross sectional view on the line 9 9 of Fig. 5.Fig. 10 is a perspective view of the clamping washer for the feedpiston. F ig. 11 is a perspective view of the feed piston packing cup.Fig. 12 is an end elevation of the feed piston body. Fig. 13 is aperspective view of a portion of the rear head block of the motorcylinder and more particularly the rearward extension thereof. Fig. 14is a perspective view with a portion broken away of the motor pistonmounting.

Similar reference numerals designate core responding parts in all thefigures of the drawings.

In the embodiment disclosed, a motor is employed, which is designatedgenerally by the reference numeral 15, and connected to the rear portionthereof, is the feeding means, designated generally by the referencenumeral 16.

The motor' 15, in the structure shown, is

of the valveless type, and comprises a cylin-v der member 17, withinwhich operates a hammer piston having an enlarged front head 1S and arear smaller head 19, the two being connected by a reduced neck 20. Thesmaller head 19 reciprocates in a mounting 21 arranged in the rearportion of the cylinder 17 and projects beyond the rear end of saidcylinder, being provided with va flange 22 abutted against said rearend. A head block 23, also fitted against the rear end of the cylinder.abuts against the iiange 22, and thus holds the mounting 21 in place.This head block has an internal chamber 24 that receives the rearwardlyextending portion of the mounting and said head block furthermore has atapered rearward extension 25 terminating in a reduced nipple 26.

Located against the front end of the cylinder 17 is a front head27provided with a forwardly extending chuck sleeve 28, in

which is clamped a bushing 29 having an .v

" tween ,the large piston head 18 and the drill 30, is a tappet 32having a bore 33 that communicates with the rear end of the bore 31 inthe drill bit, and said bore 33 is enlarged to provide an internalchamber 34, within the tappet. Leading to this chamber, are lateralports 35 that communicate at their outer ends with an annular grooveV 36formed in the periphery of the tappet, and this groove is supplied withgaseous fluid under pressure through a suitable passageway indicated indotted lines at 37.

xtending from the. nipple 26 of the head block 23, is a'liquid-conveying tube 38 that passes longitudinally through the motorpiston and into the tappet, the front end of this tube terminatingwithin the chamber 34 in rear of the port 33, but in advance'of theports 35. The tube is held in place by a plug 39 threaded into thenipple 26, and bearing against a packing gasket 40 surrounding the rearend of the tube. This packing gasket is thus compressed against the tubeand serves to effectively hold it against forward displacement, besidespreventing leakage therearound. Y

It is believed to be unnecessary to enter into a detailed description ofthe structure and operation of the motor and the liquidcleansing meansas thus far described. It is thought sufiicient to state that the motorpiston, being reciprocated, `will strike the tappet 32, and the blowsthereof will thus be transmitted to the rear end of the drill bit.Liquid delivered to the tube 38 by the meansV hereinafter described,will be projected from the front end of the tube into the port 33, andwill find :its way across the jointbetween the tappet 32 and the drillbit 30. The gaseous fluid supplied through the ports 35 will surroundthe stream of liquid projected from the tube 3S, and thus produce aninclosing column which will effectively prevent any material leakage ofthe liquid atthe joint between the tappet and the drill bit. Thusthe'drill hole will be supplied with both cleansing fluid of a gasecusand liquid nature and the objectionable leakage of liquid within thechuck is obviated.

Referring now to the feeding means 1.6, the same includes a feedcylinder 41 having a front head 42 and a 'rear head 43. These assi-11Sttherns 549:..

Within the cylinder 41 operates a piston comprising a body 51, againstthe rear end of which is fitted a leather o-r other packing cup 52 thatis, in turn, borne against by la washer 53. The parts are held togetherby a plug 54 extending through the washer 53 and cup 52 and threadedinto the body 51. rlhis plug has a head 55 bearing against the washer 53and having a groove 56 in which is located an expansible ring 57. Thehead 55 and ring 57 enter a socket 58 formed in the rear head 43, andthe ring 57, frictionally engaging the walls of this socket, serves tonormally' hold the piston in the rear end of the cylinder. This piston,comprising the parts .5l- 54, is secured to a piston rod thatis in theform of a tubev 59, the bodj.7 51 of the piston having a forward reducedextension 60 that is threaded into the rear end of the tubular rod 59.The frontend of this tubular rod is flared, as shown at 61 and lits overthe tapered rearward extension 25 of the head block23. A clamping ring62, surrounding this flared end 61 and having a tapered bore to fit thesame, serves to secure the piston rod to the headV block 23. Theclamping ring 62 is, in turn, held in place by side bolts 63 passingtherethrough and through the front head 27 of the motor cylinder. Itwill thus be evident that the means for securing theV piston rod to therear head block, also serves to retain the head block in position on therear end of the motor cylinder 17.

Motivefluid for moving the feed piston ports 69 that affordcommunication between the chamber 68 and the interior or bore of saidcoupling tube 44. The rear end ofthe coupling tube is in communicationwith a passageway 7 0 leading to the socket 58 in the rear head 43, andthus fluid under pressure is admitted to the rear end of the feedcylinder 41 behind the piston 51-54. In order to supply this motivefluid to the motor, the piston body 51, cup 52 and washer 53 areprovided with alined ports 71, which permit the fluid to pass from therear end of the piston intoV they tubular piston rod 59, and' thetapered extension 25 at its juncture with the nipple 26, has 'ports 72that afford communication between the interior ofthe piston rod 59 andthe chamber 24 in the head block 23. From this chamber the motive uidyis. distributed to the meter ,eylinderfertile-purpose- 'Of .operatingthe piston and is suitably controlled by said piston.

The means for supplying cleansing liquid to the tube 38 is preferablyconstructed as follows: Threaded into the plug 39, which is carried bythe nipple 2G of the extension 25 of the head block 23, is a rearwardlyeX- tending tube 73 that has its rear end in the reduced extension 60 ofthe feed piston body 51. Extending forwardly from the rear head 43 ofthe feed cylinder, is a smaller tube 74 that passes through the plug 54,and is slidably telescoped in the tube 73. This tube 74 is fixedly heldto the rear head 43 by a plug 75 threaded into a rearward extension 7 6formed on the head 43, the inner end of the plug 7 5 surrounding therear end of the tube 74 and bearing against a compressible packing 77,which is thereby forced against the tube and effectively holds it inplace, as well as prevents leakage. The outer end of the plug 75 ispreferably tapered rearwardly, as shown at 78 to provide an abutmentspur for the machine. In order to prevent leakage around the tube 7 4,where it passes into the tube 7 3, packing is provided. In the presentembodiment, this packing comprises a flanged washer 79 surrounding thetube 74 and having its flange abutted against the end of the tube 73.Another washer 80 bears against the washer 79, and bearing against thiswasher 80, is a coiled spring 8l. The opposite end of this coiled springbears against a washer 82 having a rearwardly tapered face that entersthe recessed end of the plug 54.

The liquid cleansing agent is supplied to the machine from any suitablesource coupled to a nipple 83 formed upon the ring 49 diametricallyopposite to the nipple 64, and the bore of this nipple S3 communicateswith an internal chamber 84 surrounding the front end of the tubularconnecting element 45. Said end has ports 85 affording communicationbetween the chamber 84 and the bore of the tube 45. The rear end of thistube 45 communicates with a passageway 86 that leads to the rear end ofthe tubev74. In the ordinary practice, a hose line is connected to thenipple 83 andrcontains an ordinary controlling valve (not shown). Itwill be evident that liquid supplied to the nipple 83, will pass throughthe tube 45, passageway 86, and thus enter the tube 74 and dischargingfrom this tube, will enter the tube 73, and thereby be delivered intothe tube 3S. Thus liquid can be supplied to the drill bit longitudinallythrough the machine, and irrespective of the relative position of thefeeding means members. It will also be evident that inasmuch as thecontrolling means for both the gaseous motive fluid and the liquid areat the front end of the feed cylinder, they are convenient to theoperator, who is engaged in rotating the machine by the medium of ahandle 87 suitably mounted on the motor and shown in Fig. l.

From the foregoing, it is thought that the construction, operation andmany advantages of the herein described invention will be apparent tothose skilled in the art, without further description, and -it will beunderstood that various changes in the size, shape, proportion and minordetails of construction may be resorted to without departing from thespirit or sacrificing any of the advantages of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is zl. In apparatus of the characterset forth, the combination with a motor, of a drill bit operated therebyand having a passageway for cleansing fluid, extensible feeding meansconnected to the motor for advancing the l same to its work, means forsupplying motive fluid to the motor, and means for passing a cleansingfluid separate from the motive fluid through the feeding means and motorto the passageway of the drill bit.

2. In apparatus of the character set forth, the combination with amotor, of a drill bit operated thereby and having a passageway forcleansing fluid, extensible feeding means connected to the motor foradvancing the same to its work, and extensible means passing through thefeeding means and motor for conducting cleansing fluid to the passagewayof the drill bit.

3. In apparatus of the character set forth, the combination with amotor, comprising a cylinder member and a piston operating therein, of adrill bit operated by the pis'ton and having a passageway for cleansingfluid, a tube extending through the piston and delivering to thepassageway of the drill bit, extensible feeding means connected to themotor for advancing the same to its work, and extensible means passingthrough the feeding means for conveying cleansing uid therethrough tothe tube.

4. In apparatus of the character set forth, the combination with amotor, comprising a cylinder member and a piston operating therein, of adrill bit operated bythe piston and having a passageway for cleansingHuid, a tube extending through the piston and delivering to thepassageway of the drill bit, extensible feeding means connected to themotor for advancing the saine to its work, and slidably telescoped tubesin the feeding means, one being' connected to the first-mentioned tube,the other to the rear portion of the extensible feeding means and havingan inlet for cleansing fluid.,

5. In apparatus of the character set forth, the combination with amotor, of a drill bit operated thereby and having a passageway Y forcleansing fluid, feeding means' lfor the motor, comprising a cylindermember and a piston member operating therein, one of said members beingconnected to the motor, means for supplying motive fluid to the motor,and means for passing a cleansing uid separate from the motive fiuidthrough the feeding means and motor to the passage'- way of the drillbit.

6. In apparatus of the character' set forth,

the combination with a motor comprising a cylinder member and a pistonoperating therein, of a drill bit operated by the piston and having apassageway for cleansing fluid, a. tube extending from the rear end ofthe cylinder member through the piston and delivering to the passagewayof the drill bit, extensible feeding means connected to the motor andcomprising a cylinder member and a piston member operating therein, onemember being connected to the motor, and slidably telescoped tubes inthe feeding means, one being connected to the first-mentioned tube, theother to the rear portion of said feeding means and having an inlet forcleansing fluid. Y 7. In apparatus of the character de scribed, thecombination with a motor, of a feed piston having a tubular piston rodconnected to the motor, a feed cylinder member surrounding the piston,and extensible cleansing fluid conducting means extending through thecylinder member and through the piston.

S. In apparatus of the character set forth, the combination with amotor, comprising a cylinder member and a. piston operating therein, ofa drill bit operated on by the piston and having a passageway forcleansing-fluid, a head block at the rear end of the cylinder member, atube mounted on the head block and extending through the piston fordelivering cleansing fluid to the passageway of the drill bit,extensible feeding means connected to the motor and com prising acylinder member and a piston operating in the cylinder member and havinga tubular piston rod connected to the head block, telescoping tubes inthe feeding means connected respectively to the head block and to therear end of the feed cylinder member and means for delivering acleansing fluid to the rear tube.

9. In apparatus of the character set forth, the combination with a motorcomprising a cylinder member and a piston member operating therein, offeeding means for the motor comprising a cylinder member and a pistonmember operating therein, a head block interposed between the motor andfeeding means and connected to one member of each, oppositely extendingcommunicating fluid conducting tubes carried by the head block anddisposed longitudinally of the motor and feeding means within 'the same,andfmeans -for delivering fluid to the tube that extendsinto thevfeeding means. l

10. In apparatus of the character set forth, the combination with amotor com.- prising a cylinder member and a piston member operatingtherein, of feeding means for the motor comprising a cylinder member anda piston member operating therein, a head block interposed between themotor and feeding means and Connected to one member of each, oppositelyextending communicating fluid conducting tubes carried by the head blockand disposed longitudinally of the motor and feedingmeans, within thesame, another tube telescoping the tube that extends into the feedingmeans, and means for supplying fluid to the telescoping tube.

1l.V In apparatus ofthe character set forth, the combination with a`motor cylin` der having a drill receiving chuck at one end and a headblock at the opposite end, of a reciprocatory piston operating in thecylinder, a tube secured to the head block, extending through the pistonand delivering to a drill bit placed in the chuck, a feed cylinder, afeed piston operating therein and having a tubular rod secured to thehead block, a rearwardly extending tube from said head block located inthe tubular piston rod, another tube connected 'to the rear portion ofthe feed cylinder and telesco-ping with the rearwardly extending tube,

and means for supplying fluid tothe thirdV tube.

l2. In apparatus of the character set forth, the combination with amotor cylinder having a chuck at one end and a head block at the otherend of a reciprocatory piston operating in the cylinder, said yheadblock having a rearwardly extending pro jection, a tube secured to thehead block andV tending tube, and means for supplying fluid to thelast-mentioned tube.

13. In apparatus of the character set forth, the combination with amotor andV drill holding means associated therewith, ofV

extensible means for feeding the motor to its work, means extending fromthe rear end of the feeding means through the same and through the motorfor delivering cleansing iuid to the drill bit, and supply means mountedon the front portion of thefeeding means and having communication withthe rear of said delivery means.

. 14. apparatus of Athe character set forth, the combination with amotor and drill holding means associated therewith, of extensible meansfor feeding the motor to its work, means extending from the rear end ofthe feeding means through the same and through the motor for deliveringcleansing fluid to the drill bit, a conduitfextending from the frontportion of the feeding means rearwardly and having communication withthe rear of said delivery means, and means for supplying cleansing fluidto the front end of the conduit. l

15. In apparatus of the character set forth, the combination with amotor and drill holding means associated therewith, of extensible meansfor feeding the motor to its work, means extending from the rear end ofthe feeding means through the same and through the motor for deliveringcleansing fluid to the drill bit, a Conduit located exteriorly of thefeeding means and longitudinally thereof, said conduit havingcommunication at its rear end with the rear end of said delivery means,and means for supplying cleansing fluid to the front end of the conduit.

16. In apparatus of the character set forth, the combination with amotor and drill holding means associated therewith, of a feed cylinder,ay piston mounted therein and having a rod connected to the motor,extensible means passing through the feeding means and through the motorfor delivering cleansing fluid to a drill bit placed in. the drillholding means, a conduit mounted on the cylinder longitudinally thereof,said conduit having communication with the rear end of the extensiblemeans, and means connected to the front end of the feed cylinder forsupplying fluid to the conduit.

17. In apparatus of the character setV forth, the combination with amotor, comprising a cylinder having a drill-receiving chuck at one endand a head block at the other end, and a piston operating in thecylinder, of a tube connected to the head block and extending throughthe piston, a feed cylinder arranged in rear of the head block, a pistonin the feed cylinder having a tubular piston rod connected to said headblock, a tube extending rearwardly from the head block within thetubular piston rod, a forwardly extending tube extending from the rearend of the feed cylinder and telescoping with the rearwardly extendingtube, a conduit carried by the feed cylinder and having communication atits rear end with the forwardly extending tube, and means connected tothe front end of the conduit for supplying fluid thereto.

18. In apparatus of the character set forth, the combination with amotor, of extensible feeding means therefor, including a cylinder memberand a piston operating therein, heads for the cylinder member, and

a tubular connection between the heads for holding the same together,said connection constituting a conduit for the passage of fluid.

20. In apparatus of the character set forth, the combination with amotor, of an extensible feed cylinder member and a feed piston memberoperating therein, a connection between one of vthe members and themotor, extensible means passing throughv the feed cylinder and pistonand through the motor for. delivering cleansing fluid, yheads for thefeed cylinder, a tubular connection between the heads for holding thesame together, said connection being external of the cylinder, and saidconnection having communication with the extensible means, and a fluidsupply nipple connected to the fron Y end of the tubular connection.

21. In apparatus of the character set forth, the combination with amotor, of feed-V ing means therefor, including a tubular memberconnected thereto, means for conveying cleansing fluid through themotor, and telescoping tubes in the tubular member of the feeding means,communicating with said conveying means.

22. In apparatus of the character set forth, the combination with amotor, of feeding means therefor, including telescoping tubular membersconnected thereto, means for conveying cleansing fluid through themotor, and telescoping tubes in the feeding means communicating with theconveying means and carried respectively by the telescoping membersof`the feeding means.

23. In apparatus of the character set forth, the combination with amotor, comprising a cylinder member and a piston op erating therein, ofa tube extending through the piston member, a feed piston having atubular rod mounted on the rear of the cylinder member, a tube Withinthe rod extending from the piston to the cylinder member, a secondcylinder member surrounding the feed piston, and a tube extending fromthe second cylinder member into the tube that is within the feed pistonrod.

24. In apparatus of the character set forth, the combination with amotor, comprising a cylinder member and a piston operating therein, of atube extending through the piston, a feed piston having a tubular rodmounted on the rear of the cylinder member, a tube within the rodextending from the piston to the cylinder member, a second cylindermember surrounding the feed piston, a tube extending from the secondcylinder Vmember into the tube that is Within the feed piston rod, and apacking carried by the piston and surrounding the last-mentioned tube.

25. In apparatus of the character set forth, the combination With a`motor oomprising a cylinder member and a hammer piston `operatingtherein, of a drill bit operated on'by the piston and having a passageWay for cleaning fluid, a tube extending through the piston anddelivering to the passageway of the drill bit, eXtensible feeding means'connected to the motor for advancing the same to its Work, andextensible means passing through the feeding means for conveyingcleaning Huid therethrough to the tube.

26. In apparatus of the character set forth,`the combination with amotor, comprising a cylinder member and a piston operating therein, of afeed cylinder,a feed piston operatingin the feed cylinder andconnectedto the motor, heads for the feed cylinder, atubularelementconnecting the'heads for 'securing the same to the feed cylinder` saidelement having comn'iunieation with the feed cylinder and saidfe'edpiston having a passa-ge communicating Withthe motor, and means forsupplying motive fluid to 'the Y tubular element.

cylinder member, said feed piston having' l passageways therethroughcommumoatlng with the interior of theitubular rod,heads Y for the feedcylinders, a'tube connecting the heads for Vsecuring them together, therear end of saidftube communicating 'with the interior ofthe feedcylinder, and a valved motive Huid supply connectlon 'connected to thefrontend of the'tube.` Y

VIn testimony'whereof I have hereunto setmy hand in presence of-twosubscribing'witnesses.

lVitnesses:

JAS. R. EL'MENBORF, H. E. FISKE.

Copies of this patent may be obtained 'for five cents each, byaddressing the Commissioner of Patents,

' Washington, D. C. f

DaNi-EL fsQ-WAUGH. Y

